2017年上半年信息系统项目管理师上午综合知识真题与答案解析：

Cloud computing is a type of Internet-based computing that provides shared computer processing resources and data to computers and other devices on demand. Advocates claim that cloud computing allows companies to avoid up-front infrastructure costs. Cloud computing now has few service form, but it is not including （）.

71、Cloud computing is atype of Internet-based computing that provides shared computer processingresources and data to computers and other devices on demand. Advocates claimthat cloud computing allows companies to avoid up-front infrastructure costs.Cloud computing now has few service form, but it is not including （）.

A、IaaS

B、PaaS

C、SaaS

D、DaaS